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Question

A bicycle wheel has a diameter of 7 cm. What distance does the wheel cover on the ground if it completes 1 full rotation?

(Assume π=227)


A

44 cm

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B

22 cm

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C

21 cm

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D

42 cm

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Solution

The correct option is B

22 cm


1 complete rotation = circumference of the wheel = 2πr=πd

(where, r is the radius and d is the diameter =2r)
Distance covered =πd
=227×7
Distance covered = 22 cm.


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